Improvement in steam-engine piston-valves



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To ALL WHoM rr MAY coNcERN:

Be it known that I, ISAAC SOULE,.of Albany, in the county of Albany, andState of New York, have invented a new and useful Improvement onBalance-Valves for Steam-Engines; andI do hereby declare that thefollowvngs afull, clear, and exact description of the constructionoperation of the same, reference being had to the annexed drawings,making a part of this specification, in whichv Figure 1 is alongitudinal central sectional view of the steamehest and cylinder, withmy valve and spirallyslotted bushing applied thereto.

Figure 2 is au end sectional view taken in the line :e zig/fig. 1.

Figures 3 and 4 are detail views or isolated parts of `my invention.

The object of this invention is to render balance-valves more easilyoperated than any heretofore used, by admitting the steam between thetwo followers or sliding-disks, secured to a rod, and arranged within asuitable cylinder, and also permitting the exhaust steam from the engineto act upon or against said followers in Suche. y

manner asrto accelerate the motion, or assist the operation of saidvalve. The followers slide withindetachable bushings, provided'withspiral slots, to prevent the packing-rings of the followers frombecoming unequally worn or ehannelled. Said slots, with encirclingchamber, form the steam-ports.

- To enable others skilled in the art to fully understand and constructmy invention, I will proceed to describe it, as follows:

A, figs. 1 and 2, represents an ordinaryengine-cylinder, and tt-ed so asto have secured therctoa cylindrical steam-chest, B, and having steamcommunication together, at the ports b b. The exhaust-portie representedat c e, fig. 1. The steam is admitted into the chest 13 at the point d,and` between the followers e e. Said followers are provided withsuitable packing-rings, in order to compensate for the wear that theyare subjected to in passing or sliding within and in contact with theinner surface of the spirally-slotted bushingff. The disks -or followerse e are secured to a rod in such a manner as to give the proper lap andlead at the steam-ports in the bushingsff. In the drawing, fig. 1, steamis represented as entering the cylinder A through the port b,

and exhausted through the port b. It, therefore, will bercadily'perccived the advantage that this arrangement possesses overother balance-valves, wheuused in connection with the detachable,spirally-slotted bushings ff.

1. I claim the bushings ff, constructed substantiallyas and for thepurpose speeied.

2. I claim the steam-passages arranged as described, with reference tothe followers e'e and bushings ff,

for the purpose herein set forth. Y

ISAAC SOULE.

Witnesses:

J. W. Ln'rennn, G., C. HEGEMAN.

